Chute-closure.



H. S,- GARDNER.

OHUTE GLOSURE.

I APPLIOATION FILED JUNE-27, 1911.

Patented May 14, 1912.

UNITED STATES PATENT orruon' HOWARD S. GARDNER, OF EAST ORANGE, NEW JERSEY.

CHUTE-OLOSURE.

Specification of ietters fatent.

Patented May 14, 1912.

Original application filed February 24, 1910, Serial No. 515,630. Divided and this application filed June 27, 1911. Serial No. 635,674.

To all whom it may concern: I

Be it known that I, I'lOWARD S. GARDNER.

a citizen of the United States, residing at East Orange, in the county otEsseX and 5 State of New Jersey, have invented certain new and usefullmprovements in Chute- Closures; and I do hereby declare the following to be a full, clear, and exact description of the inventiom'such as will enable others skilled in the art to which it apper- 7 ,struction to the lower floors thereof.

This invention consists in the novel construction and combination of the parts hereinafter fully described and claimed whereby the discharge of thematerial from the ichute is regulated.

In the drawings, Figure l is a vertical section through the lower part of a chute :provided with a closure according to this invention. Fig. 2 is a front view of the discharge-door. Fig. 3 is a front. view of a modified form of the discharge-door.

The main portion of the chute consists of a vertical tube C which passes through *openings in the floors of the building in v course of construction, and which is supported from the said floors in any approved manner. The lower part of this tubular chute is provided with an inclined deliverypipe E arranged at an angle to the vertical,

and this )i e E has a suitable dischar el door F which controls the discharge of the concrete. The pipe E has a retarding-plate G secured inside of it, and preferably pro- Vided with a slidable plate or portion 7. The plates G and g are arranged diagonally of the pipe E, and a convergingpassage is for the material is formed between these plates and the lower part of the periphery of the pipe. The function of this retarding-plate, or plates. is to sustain the major portion of the weight of the concrete in the delivery-chute, which forms a reservoir for the concrete, and to furnish an aperture of desirable size for the concrete to pass out of when the door F is opened.

When the slidable plate 9 is used its position'is varied to suit the nature and condition of the material being used, and also to suit the weight of thcmaterial in the main chute, the length of which varies with the height of the building and the. number of the floor which is being supplied with concrete for the time being.

The two platesG and g are secured together by bolts gf when the slidable plate has been suitably adjusted. Ope of the said plates is provided with a slot to permit the slidable plate to be slid crosswise of the bolts. V

The discharge-door F is pivoted by a hinge pin f to the upper part of a frame H which is secured to the tube E, and a handle I is provided for opening the door. The door is held in any desired position by means of a pin 5 which is inserted through holes j in a quadrant-plate J and which engages with the handle. The retarding-plate G insures the discharge of the material at the lower .part of the door and clear of its hinge or pivot. Any other approved form of discharge-door may be used in carrying out this invention, and in Fig. 3 the dischargedoor F is pivoted to the delivery-pipe E by a pin f so that it slides crosswise of the mouth of the delivery-pipe. This door F is provided with an operating-handle I and it can be opened to any desired extent.

closure at the bottom end of a delivery chute, as the same closure can be applied to the chute at intermediate points of its length, and between the various floors of the building. The main portion of the chute is shown in a vertical position, but it may be arranged in an inclined position to suit different locations, and it may be used for dif ferent materials either wet or dry.

\Vhat I claim is:

1. The combination, with a chute provided with a tubular delivery-pipe arranged at an angle to the vertical, of a discharge-door pivoted to the upper side of the discharge end of the said delivery-pipe, and a retardging-plate for the material secured diagonally in the delivery-pipe, a converging outlet passage for the l'natcrial being formed @botwccn the said plate and the lower side 1 of the delivery-pipe, through which passage the material is discharged clear of the door l pivot.

I do not confine myself to the use of this 2. The combination, with a chute provided with a tubular delivery-pipe which is ar ranged at an angle to the vertical, of a dis charge-door at the lower part of the delivery-pipe, a retarding-plate secured diagonally in the delivery-pipe and forming with it a converging passage, the upper portion of the said plate being arranged in contact with the said ipe and a discharge opening being formed etween the bottom edge of the said plate and the side of the discharge-pipe at the smaller end of the converging passage, and a slidable plate provided with a fastening device and arranged on one side of the aforesaid plate and adapted to adjust the width of the said dischargeopening.

3. The combination, with an inclined tubular delivery chute, of a discharge door hinged to the chute above its lower side and normallyclosing its bottom end, and a retarding plate for the material secured diagonally in the tubularchute and forming a delivery passage'against its lower side, said passage being provided with an outlet openin at the bottom of the chute below the level 0 the door hinge.

In testimony whereof I have affixed my signature in the presence of two witnesses.

HOWARD S. GARDNER.

Witnesses EDWARD W. Ponce, RUSSELL JOHNSON. 

